Looking at the most predictive leafs, we note that patients showing sHE4 ≥ 78.05 pM and advanced clinical stage have a 95% probability of having a surgical FIGO stage > I (see Leaf 7 with ŷ7 = 0.95). On the contrary, in the right branch of the tree (sHE4 ≥ 78.05 pM...